package xin2;
class Animal {
    void shout(){
        System.out.println("动物发出叫声");
    }
}
class Dog extends Animal{
    void shout (){
        System.out.println("汪汪汪……");
    }

}

public class Example03 {
    public static void main(String[] args) {
        Dog dog = new Dog ();
        dog.shout();
    }
}
